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The amplifier LF "Impulse-80" was produced presumably since 1978 by the Kherson plant of semiconductor devices. Designed to amplify low-frequency signals from microphones, electric guitars, electric organs, synthesizers, tape recorders and other sources. Designed to work in the pop music ensembles. The device consists of a monophonic bass amplifier with a mixer of six channels in one housing, has three microphone inputs, two inputs for connecting electric guitars and one for connecting an electric organ. For each of the 6 first inputs, it is possible to adjust the volume level, as well as timbre at the highest and lowest audio frequencies. There is an exit on "a loop" of effects with adjustment of level and two exits to speaker systems. The amplifier provides electronic protection against short circuit load, there is an overload indicator that allows you to monitor its operation mode. The amplifier was produced in two variants of external design and with two speakers (2 types). The rated output power of the amplifier is 75 watts at a load of 6 ohms. Maximum output power 150 watts. The nominal frequency range of the amplifier is 30 ... 20000 Hz. SOI 1%. The tone adjustment range is ± 12 dB. Power consumption not more than 300 watts.